Crushing-mill.



J. F. ONEIL.

CRUSHING MILL. v APPLICATION FILED MAY 5. 1915.

3 SHEETSSHEET 1.

PO 1 9 11 2 1 C e D 0 AU t n e t a P J. F. ONEIL.

CRUSHING MILL. APPLICATION FILED MAY}5,1915.

Patented Dec. 12, 1916.

3 SHEETS-SHEET 2- J. F. ONEIL.

CRUSHING MILL.

APPLICATION FILED MAY 5,1915.

Patented Dec. '12, 1916.

3 SHEETS-$HEET 3,.

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J'UHN F. ONEIIi, OF ST; LOUIS, MISSOURI.

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Application filed May 5. 1915.

To all whom it may concern:

Be it known that I, JOHN F. ONEIL, a citizen of the United States of America, and a resident of the city of St. Louis, in the State of Missouri, have invented certain new and useful Improvements in Crushing-Mills, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to an improvement and away from another roll in accordance tltt dill

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with thequantity of material passing between the rolls. Heretofore such mills have been provided with spring pressed scrapers which engage the yielding crushing rolls, and these spring pressed scrapers yield in response to certain movements of said yielding rolls. However, the prior devices have been so constructed and arranged that the degree of inclination of the scraper blades change when the yielding roll moves toward and away from another roll. A more objectionable disadvantage in the prior devices is that the scraper blades do not accurately follow the movements of the crushing rolls. To illustrate, the axes of the crushing rolls are intended to lie parallel with each other, but the material frequently passes between the rolls in an irregular mass, and when the quantity of material at one end of the yielding roll is greater than the quantity at the other end, the yielding roll is tilted and its axis then lies at an angle to the axis' of the other roll. The prior scraping devices are not adapted to partake of movements of this kind, for they are merely forced against the periphery of the roll, and when the roll tilts, the scraper is rendered almost entirely ineffective.

Therefore, a most important object of my invention is to produce a scraping device which will move at all times with the yielding roll, including when the latter tilts.

With this object in View the improvement comprises a scraper which moves with the Specification of Letters Patent.

Patented Dec. 12., 1916.

Serial No. 25,946.

roll so as to remain constantly in a certain predetermined position with respect to the axis of the roll.

Figure I is a rear elevation of a crushing mill equipped with my scraping device. Fig. II is a side elevation, partly in section. Fig. III is an enlarged vertical section, illustrating the upper portion of the crushing mill. Fig. IV is a rear elevation of the parts shown in Fig. III.

A designates side frames provided with guide members 1., A lower crushing roll 2, arranged between the side frames A, is provided with journals 3 which rest upon bearings 4, the latter being arranged between the guide members 1. A yieldable crushing roll 5, arranged above the r0112, is provided with journals 6 which lie between the guide members 1.

7 designates bearings fitted to the journals 6 and slidably fitted to the guide members 1. Caps 8, fitted to the guide members 1, engage the top faces of the bearings 7.

9 designates tension rod's,passing through the caps 8, and secured at their lower ends to heads 10. Nuts 11 adjustably secure the tension rods 9 to the caps 8, and nuts 13 secure the heads to said rods. Each head 10 is provided with a plunger 13 which forms part of a hydraulic ram, said plunger being fitted to the cylinder 11 having an inlet opening 15 for the reception of a fluid which is forced into the cylinder for the purpose of forcing the head 10 downwardly. The pressure derived from the introduction of fluid into the cylinder 14 places the rods 9 under tension, thereby forcing the caps 8 downwardly onto the bearing members 7, to

move the crushing roll 5 toward the crushadapted to move toward and away from the lower crushing roll 2. These-rolls are preferably grooved as shown .most clearly in Fig. I, and they may be rotated by any suitable power mechanism to crush the material which passes between them. The mechanism I have shown is a cane mill and the fibrous material is discharged onto the member 17 -ing roll 2/ ()bviously, the crushing roll 5 is 1 the latter being fixed to a rod 22 having its end portions rockably' mounted in bearing members.23. These bearing members are preferably attached to the caps 8 which rise and fall in response to movements of the yielding crushing roll 5. By constructing the scraping device in this manner, I promovements of the yielding roll 5.

The means for forcing the scraper 20 into engagement with the roll 5 comprises a pair of arms 25secured to the ends of the rod 22, spring holding rods 26 passing through the lower ends of the arms 25 and pivotally supported at 27 and springs 28 surrounding the rods 26. Each rod 26 is provided with a spring seat 29 rockably fitted to the lower end of ,an arm 25, and also provided with a spring seat 30. The springs 28 lie between the spring-seats 29 and 30 so as to force the lower ends of arms 25 toward the .side frames A, thereby forcing the scraper 20 into engagement with the roll 5. It is to be noted that the springs 28 are not intended to compel the scraper to follow the yielding roll, such movement being derived from the peculiar manner in which the scraper is supported by the heads 8 which move with said yielding roll.

I claim 1. A crushing roll comprising a main support provided with guides, a rotatable crushing roll, a yieldable crushing roll movable toward and away from the first mentioned crushing roll, the ends of said yieldable crushing roll being provided with j ournals which lie between said guides, bearing members fitted to said journals and guided by said guides, caps fitted to said bearing members, means for forcing said caps onto said bearing members to yieldingly force said yieldable roll toward the other roll, scraper bearings secured to said caps, a rod having its ends fitted to said scraper bearings, a scraper fitted to said yieldable roll and secured to said rod, arms secured to said rod, and means associated with said arms so as to force said scraper into engagement with said yieldable roll.

2. A crushing roll comprising a main support provided with guides, a rotatable crushing roll, a yieldable' crushing roll movable toward and away from the first mentioned crushing roll, the ends of said yieldable crushing roll being provided with journals which lie between said guides, bearing members fitted to said journals and guided by said guides, caps fitted to said bearing members, means for forcing said caps onto said bearing members to yieldingly force said yieldable roll toward the other roll, scraper bearings secured to said caps, a rod having its ends fitted to said scraper bearings, a scraper fitted to said yieldable roll and secured to said rod, arms secured to said rod, spring holders passing through said arms and pivoted to said main support, and springs associated with said spring holders so as to force said scraper into engagement with said yieldable roll.

JOHN F. ONEIL. 

